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3. AJAX Authentication and Related Logical Payments 1.AJAX Authentication Ajax definition: AJAX is not a specification of JavaScript, it's just an abbreviation for the brother's "invention": Asynchronous JavaScript and XML, meaning to execute asynchronous network requests using JavaScript. Asynchronous: refers to sending multiple d ...

Analysis of CSRF and XSS preface Bloggers recently had an interview and encountered a question: * * What are the principles of CSRF and XSS? How to prevent CSRF and XSS** Because the blogger didn't understand this part deeply enough, the answer in the interview was not comprehensive enough. Today, let's discuss the mystery behind CSRF and X ...

Catalogue of series articles Recently, I encountered the problem of jumping from multiple domain names to session s. Here is a Demo to record my ideas Preparation conditions 1. Framework thinkphp5 one 2. apache server 3.MySQL database I Problem description Suppose I have two sites with different domain names, a.com and b.com, ...

reference Install Let's Encrypt certificate through Certbot to realize HTTPS access of the whole station College army - upgrade blog application from HTTP protocol to HTTPS for free certbot official website address Open the home page and select your own system version first (the web server I use here is nginx and the system is centos7) Tran ...

Remote video surveillance The Internet of things has been unknowingly integrated into our life and brought convenience to us. For example, smart door locks, ETC electronic automatic charging system, ETC. at first, it felt very novel, and now it is used to it. It can even be said that the Internet of things is the inevitable trend of Internet ...

SUCTF 2019]EasyWeb Test site: No alphanumeric shellUse htaccess upload fileBypass open_basedir Source code audit <?php function get_the_flag(){ // web admin will remove your upload file every 20 min!!!! $userdir = "upload/tmp_".md5($_SERVER['REMOTE_ADDR']); //Naming format (upload/tmp_md5(ip)) if(!file_exists($userdir)){ ...

catalogue 1, Basic knowledge Establish and close the connection with MySQL server 1) Connect to the specified mysql server 2) Prompt in case of connection error 3) Set default character encoding 4) Select a specific database: mysqli_select_db ( $link , string $dbname); 5) Close the connection with mysql server 2, Realize login registr ...

In the process of system development, sorting data is a very common scenario. Generally speaking, we can adopt two ways:With the help of the sorting function of the storage system (supported by SQL, NoSQL and NewSQL), the query result is the ordered resultThe query results are unordered data and sorted in memory.Today I want to talk about the s ...

1, PHP development landing page 1. Database construction First create a test database login table in mysql database: Set the following fields: id: it is unique, type int, and select the primary key. uesrname: user name, type varchar, length 30. Password: password, type varchar, length 30. Add a user name and password for testing A d ...

Node.js is a JavaScript running environment based on Chrome V8 engine, which is usually used to create web applications. It can handle multiple connections simultaneously and is not thread dependent like most other models. For Web developers, the scenario of obtaining data from a database or Web server and then outputting it to an Excel file f ...